# Software Engineer II (Backend, Growth)

**Company:** [WHOOP](https://hotfix.jobs/companies/whoop)
**Location:** Boston, MA
**Role:** Backend Engineering
**Skills:** Java, Kafka, Postgres, AWS, REST APIs, SQS, Relational Databases
**Posted:** 2026-01-09

> Backend engineer on the Growth team building scalable APIs and infrastructure for user acquisition, e-commerce, and experiments using Java, Kafka, Postgres, and AWS. Collaborates cross-functionally to deliver high-impact features supporting millions of users.

## Job Description

## Responsibilities
- Collaborate closely with product managers, designers, and fellow engineers to develop scalable and reliable backend services.
- Build, maintain, and optimize APIs and infrastructure supporting our acquisition funnels, e-commerce experiences, and membership growth experiments.
- Write well-tested, maintainable code using technologies such as Java, Kafka, Postgres, and AWS.
- Break down feature requirements into actionable tasks, prioritize work, and consistently deliver on sprint commitments.
- Contribute to backend architecture discussions and implementation of scalable, high-availability services that support millions of users.
- Work with data scientists and analytics engineers to support experimentation and measure performance.
- Participate in code reviews and collaborate on best practices with your engineering peers.

## Qualifications
- Professional backend engineering experience in a production environment.
- Proficiency in building APIs and working with relational databases (e.g., RESTful APIs, Postgres).
- Experience with event-driven systems and asynchronous processing tools such as Kafka or SQS.
- Skilled in writing comprehensive tests and clear documentation.
- Demonstrated ability to work cross-functionally and communicate clearly with technical and non-technical stakeholders.
- A growth mindset and eagerness to learn from feedback and new challenges.
- **Bonus:** Experience with A/B testing frameworks or growth-focused engineering initiatives.

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**Canonical:** https://hotfix.jobs/jobs/aa1eafc7-3f2b-46d2-b9ea-50fd4f97f600